Texas Instruments ADC088S102CIMTX

Overview

ADC088S102 from Texas Instruments is an 8-channel, 8-bit successive-approximation ADC with SPI-compatible serial interface, 500 kSPS to 1 MSPS throughput, ±0.2 LSB INL (max), and operation over −40°C to +105°C - used for multi-sensor data acquisition in portable medical instruments and automotive navigation systems.

For engineers reviewing the ADC088S102 datasheet, ADC088S102 pinout, ADC088S102 application, or ADC088S102 equivalent, key selection considerations include its independent analog/digital supplies (VA: 2.7–5.25 V, VD: 2.7–VA), 16-pin TSSOP package, channel-to-channel isolation of 69.6 dB, and power-down consumption of just 0.03 µW at 3 V.

Technical Context

The ADC088S102 implements a charge-redistribution DAC architecture with internal track-and-hold, acquiring input voltage during the first 3 SCLK cycles and completing conversion in the subsequent 13 cycles. Its 8-input multiplexer supports dynamic channel selection via a programmable 3-bit control register (ADD2–ADD0).

It uses straight binary output coding, accepts analog inputs from 0 V to VA, and features separate AGND/DGND pins to minimize digital noise coupling into analog conversion. The serial interface operates at 8–16 MHz SCLK, with DOUT active only when CS is low and MSB-first timing aligned to SCLK falling edges.

Key Specifications

Pinout & Package

ADC088S102 is housed in a 16-lead TSSOP (Package PW0016A) with exposed pad not electrically connected. Pin functions are validated per TI SNAS339B Rev. MARCH 2013.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 8-bit, multi-channel SAR ADC applications.

Compared with ADS7822U and MAX11100ETE+, the ADC088S102 uniquely combines 1 MSPS throughput, true 8-channel capability, independent dual supplies, and sub-µW shutdown - making it optimal for compact, battery-aware, multi-sensor embedded systems requiring guaranteed linearity and industrial temperature operation.

Availability

ADC088S102 is available at Aetrix Electronics and suitable for automotive navigation, portable medical monitoring, and industrial process control applications requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for ADC088S102 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader delivering analog, embedded processing, and connectivity solutions with emphasis on reliability, precision, and energy efficiency.

The ADC088S102 belongs to TI's precision data acquisition portfolio, designed specifically for cost-sensitive, multi-channel, low-power embedded systems where small size, wide temperature operation, and SPI simplicity are critical.

FAQ

What is the maximum clock frequency supported by the ADC088S102?

The ADC088S102 supports a maximum SCLK frequency of 16 MHz, as specified in the Absolute Maximum Ratings and AC Electrical Characteristics tables of the SNAS339B datasheet. Operation above this frequency risks timing violations, incomplete conversions, or corrupted DOUT data. At 16 MHz, the device achieves its rated 1 MSPS throughput with 16 SCLK cycles per conversion frame.

Does the ADC088S102 require an external reference voltage?

No, the ADC088S102 does not require an external reference. It uses the analog supply voltage (VA) as its internal reference, with input range defined as 0 V to VA. This simplifies design by eliminating external reference ICs and associated routing, provided VA is well-bypassed and stable - a requirement explicitly stated in the datasheet's Power Supply Considerations section.

Can the ADC088S102 operate with VA = 3.3 V and VD = 1.8 V?

No. Per the Operating Ratings table, VD must be ≥ 2.7 V and ≤ VA. A VD of 1.8 V violates the minimum digital supply specification and will cause functional failure. Valid configurations include VA = VD = 3.3 V, or VA = 5.0 V and VD = 3.3 V - but VD cannot be less than 2.7 V or exceed VA.

How is channel selection implemented on the ADC088S102?

Channel selection is controlled via a 3-bit address field (ADD2–ADD0) loaded into the ADC088S102's internal control register through the DIN pin during the first 8 rising edges of SCLK after CS falls. Table 3 in the SNAS339B datasheet maps ADD2:ADD0 values (e.g., 000 = IN0, 111 = IN7) - enabling software-selectable, sequential, or random access to any of the eight analog inputs.

What is the aperture delay of the ADC088S102 and why does it matter?

The ADC088S102 has a specified aperture delay (tAD) of 4 ns, defined as the time between the fourth falling edge of SCLK and internal sampling of the analog input. This tight, deterministic delay enables precise time-of-flight measurements and phase-coherent sampling across multiple ADCs in synchronized systems - critical for applications like motor current reconstruction or ultrasound beamforming where timing jitter directly impacts signal fidelity.